Internal links are hyperlinks that connect one page of a website to another page within the same site. They help users navigate the website more easily and allow search engines like Google to understand the structure and content of the site better. By using internal links, website owners can guide visitors to related content, improving user experience and keeping them engaged longer. These links can also enhance a site's search engine optimization (SEO) by distributing page authority across different pages. When a page has many internal links pointing to it, it signals to search engines that the content is valuable, potentially improving its ranking in search results.